CN115158549A - Tension leg mooring offshore floating type fan foundation structure - Google Patents
Tension leg mooring offshore floating type fan foundation structure Download PDFInfo
- Publication number
- CN115158549A CN115158549A CN202210818241.1A CN202210818241A CN115158549A CN 115158549 A CN115158549 A CN 115158549A CN 202210818241 A CN202210818241 A CN 202210818241A CN 115158549 A CN115158549 A CN 115158549A
- Authority
- CN
- China
- Prior art keywords
- floating
- wind turbine
- tension
- upright post
- tension leg
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B21/00—Tying-up; Shifting, towing, or pushing equipment; Anchoring
- B63B21/50—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers
- B63B21/502—Anchoring arrangements or methods for special vessels, e.g. for floating drilling platforms or dredgers by means of tension legs
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B63—SHIPS OR OTHER WATERBORNE VESSELS; RELATED EQUIPMENT
- B63B—SHIPS OR OTHER WATERBORNE VESSELS; EQUIPMENT FOR SHIPPING
- B63B35/00—Vessels or similar floating structures specially adapted for specific purposes and not otherwise provided for
- B63B35/44—Floating buildings, stores, drilling platforms, or workshops, e.g. carrying water-oil separating devices
- B63B2035/4433—Floating structures carrying electric power plants
- B63B2035/446—Floating structures carrying electric power plants for converting wind energy into electric energy
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/727—Offshore wind turbines
Abstract
The invention provides a tension leg mooring offshore floating type wind turbine foundation structure, which comprises a floating body, a mooring system and an anchoring system, wherein the mooring system comprises a mooring rope and a mooring rope; the floating bodies comprise a central upright post and a plurality of groups of floating barrels which are connected between the central upright post and the outer upright post and are distributed in a star-shaped symmetrical mode, each group of floating barrels is two, the two floating barrels are arranged in an upper layer and a lower layer, one ends, far away from the central upright post, of the floating barrels are connected to the outer upright post, gaps are formed between the upper layer of floating barrels and the lower layer of floating barrels close to the central upright post for water flow to pass through, and the top of the central upright post is used for being connected with a tower barrel of the offshore floating type fan; the floating body is fixed on the seabed through a mooring system and an anchoring system, and the mooring system is always in a tension state. The floating body has the advantages of small steel consumption, small horizontal and vertical wave current load, uniform stress of the platform structure, small stress of the tension tendon, capability of prolonging the service life of the tension tendon and capability of reducing the design load and the construction and installation cost of an anchoring foundation.
Description
Technical Field
The invention relates to the technology of offshore floating type wind turbines, in particular to a foundation structure of an offshore floating type wind turbine moored by tension legs.
Background
With the development of offshore wind power engineering technology, offshore wind power generation gradually shows good economic benefits. The main ocean countries in the world all increase the investment on the offshore wind power industry, and develop a large amount of offshore wind power development. At present, offshore wind farms are developed more fully, and deep and far sea wind power development in the future becomes key work of offshore wind power development of various countries. Due to the limitation of engineering technology, the development cost of deep and open sea wind power is still high at present, and the requirement of commercial development cannot be met. Therefore, finding a floating type fan scheme with more optimized cost is a hot research direction of the international offshore wind power industry at present.
At present, a plurality of demonstration application researches of semi-submersible floating wind turbine foundations are carried out all over the world, and demonstration results show that the cost of most semi-submersible platform foundations is higher than 3 ten thousand yuan/kw and is about 2-3 times higher than the commercial development cost. Therefore, to promote the large-scale application of floating wind power, the cost of the prior art needs to be greatly reduced.
Disclosure of Invention
Aiming at the problem of overhigh foundation cost of the existing floating type wind turbine, the invention aims to provide a tension leg mooring offshore floating type wind turbine foundation structure which has the advantages of small steel consumption of a floating body, small horizontal and vertical wave flow loads, uniform stress of a platform structure, small stress of a tension tendon, prolonged service life of the tension tendon, capability of reducing design load of an anchoring foundation and further reducing the structure size of an anchoring foundation system and construction and installation cost.
In order to realize the purpose, the invention adopts the technical scheme that: a tension leg moored offshore floating type wind turbine foundation structure comprises a floating body, a mooring system and an anchoring system;
the floating body comprises a central stand column, a plurality of outer side stand columns and a plurality of groups of floating barrels which are connected between the central stand column and the outer side stand columns and symmetrically distributed in a star shape, each group of floating barrels is two (an upper layer floating barrel and a lower layer floating barrel), the two floating barrels are arranged in an upper layer and a lower layer, one end, far away from the central stand column, of each floating barrel is connected to the outer side stand column (the outer side stand column can be a round stand column, can also be a square or a polygonal column body), the distance between the upper layer floating barrel and the lower layer floating barrel is more than 1 meter, the upper layer floating barrel and the lower layer floating barrel are arranged in a non-parallel mode, a larger gap is formed in the position close to the central stand column, water flows can pass through the gaps, and the top of the central stand column is used for being connected with a offshore floating type fan tower barrel; the buoys arranged in the upper layer and the lower layer can increase the number of the buoys to provide more buoyancy, and can reduce the vertical projection area and reduce the wave load caused by the water quality point and the structure action. In addition, the gap between the upper layer of floating cylinders and the lower layer of floating cylinders can allow water flow to bypass, so that the horizontal load of the water flow on the floating cylinders is reduced;
the bottom end of the upright column at the outer side of the floating body is connected with an anchoring system through a mooring system, namely, the floating body is fixed on the seabed through the mooring system and the anchoring system, and the mooring system is always in a tension state. The tension leg moored offshore floating type wind turbine foundation structure can provide larger buoyancy, and ensures that the system always keeps positive buoyancy under various marine environmental conditions, namely the mooring system is always in a pulled state, so that the foundation function of the tension leg floating type wind turbine is realized.
Further, the floating body comprises 3-8 groups of buoys, preferably 3-5 groups of buoys. The plurality of groups of buoys are symmetrically arranged around the center of the central upright post.
Further, the cross section of the buoy is circular, square or polygonal. Specifically determined by the construction, installation and operational requirements.
Further, the structural form of the pontoon is a ribbed plate shell form.
Furthermore, the sections of the buoys are kept in a uniform shape or gradually change along the axial direction, and the buoys can be kept in a uniform section or have smaller radial section radius at the side far away from the central upright post and larger radial section radius at the side close to the central upright post so as to bear the action of larger bending moment at the center.
Further, the lower layer of buoys can be arranged horizontally or inclined downwards (the inclination angle is 0-30 degrees), and the upper layer of buoys can be arranged horizontally or inclined upwards (the inclination angle is 0-30 degrees). The inclination angle is set according to the requirements of manufacturing, installation and in-place working conditions.
Further, the buoy material is steel, concrete or other composite materials meeting strength and corrosion requirements, including but not limited to glass fiber reinforced materials. The invention realizes the reduction of steel consumption by optimizing the shape and reducing the volume.
Further, the mooring system is a tendon. The tension tendon keeps a tension state in a life cycle, keeps the tension at a higher level and avoids integral instability caused by the movement of the fan and the foundation.
Further, each outer upright post is connected with 2-3 tension tendons.
Furthermore, the tension tendon is a steel pipe, an anchor chain, a steel cable or a composite fiber material.
Further, the tendons may be perpendicular to the sea bed or slightly inclined.
Further, the anchoring system is a suction bucket foundation, a pile foundation or a gravity foundation.
Furthermore, a flange plate is reserved at the top of the central upright column so as to be connected with the offshore floating type wind turbine tower.
The invention also discloses an offshore floating type wind turbine system, which comprises the offshore floating type wind turbine foundation structure moored by the tension legs, a tower drum and a wind turbine, wherein the wind turbine is arranged at the upper end of the tower drum, and the lower end of the tower drum is connected to the top of the central upright post. The offshore floating type fan system adopts a double-layer floating drum form, the wave load is not increased while the buoyancy is improved, meanwhile, the double-layer floating drum provides larger structural strength, the internal stress level of node steel is reduced, and the structural safety is improved.
Installation of the offshore floating wind turbine system: 1) The invention relates to a novel tension leg type floating wind turbine platform, which integrates a tension leg mooring offshore floating wind turbine foundation structure, a tower, a wind turbine unit and blades at a shore wharf. 2) And (4) carrying out the installation of an anchoring system and a tensioning mooring system in advance at the position of the fan. The installed taut mooring system may be temporarily placed on the sea floor or placed in tension in the water with a temporary buoy. 3) The integrated floating fan system is transported to a fan position by a transportation auxiliary floating body or a barge for installation in place. 4) After the floating wind turbine arrives at the aircraft site, the ballasting down draft is connected to the taut mooring system. And after the connection is finished, discharging ballast water to enable the floating body to float upwards, tensioning the mooring system, and finishing the in-place installation of the floating body.
Compared with the prior art, the tension leg mooring offshore floating type wind turbine foundation structure and the offshore floating type wind turbine system have the following advantages that:
1) The tension leg floating type wind turbine foundation concept form considers the stress characteristic of the tension leg floating type foundation, and adopts the upper layer and the lower layer of floating drum structures, so that on one hand, the integral buoyancy of the structure is increased, on the other hand, the vertical projection area is reduced, the purpose of reducing vertical wave and ocean current loads is achieved, the alternating load amplitude of tension tendons is further reduced, and the fatigue life of the tension tendons is prolonged. In addition, a horizontal gap is reserved between the buoys arranged in the upper layer and the lower layer, water can flow around and pass through the gaps, and the purpose of reducing the wave flow load of the platform in the horizontal direction is achieved. Thereby reducing the platform motion and the stress of the tension tendon.
3) A floating foundation in the form of a tension leg may have a larger cost optimization space than a semi-submersible floating wind turbine. Compared with a semi-submersible type fan, the tension leg floating type fan has a plurality of advantages, firstly, the tension leg floating type foundation size is smaller, the steel consumption is smaller than that of the semi-submersible type floating type fan, and the steel consumption can be generally reduced by about 30%. The length of the tension leg floating type fan mooring system is smaller, which can reach 1/5-1/10 of the catenary mooring system, and the cost is lower than that of the catenary mooring system of the semi-submersible fan. And thirdly, the floating foundation of the tension leg has excellent motion performance, and the swing motion and the swaying motion of the platform can reach 1/10 order of magnitude of the semi-submersible foundation, so that the floating foundation is friendly to an upper unit, the reliability of the fan unit can be obviously improved, and the unit cost is further reduced. Fourthly, the tension leg base is beneficial to the design of the dynamic submarine cable, because the dynamic floating body moves less, the linear design of the dynamic submarine cable is easy, and the fatigue damage of the dynamic submarine cable can be obviously reduced.
4) The invention relates to a tension leg type floating wind turbine foundation which can provide more buoyancy under the condition of limited steel consumption compared with other floating foundations. The use efficiency of steel is improved, and the cost of the floating foundation is reduced.
5) The floating foundation form provided by the invention can provide more buoyancy without increasing the vertical stress of the floating body, and reduces the stress of the tension tendon and the stress of the anchoring system, thereby reducing the cost of the tensioning mooring and anchoring system.
6) The invention provides a tendon mooring system, which makes full use of the self tensile property of the material to provide mooring rigidity, and compared with a catenary mooring mode, the tendon mooring system has the advantages that the length is greatly reduced, the number of accessories of the mooring system is less, and the mooring cost is greatly reduced.
7) The floating body provided by the invention has higher bending rigidity, more reasonable structural stress performance, greatly improved hot spot stress level and safer structural application.
Drawings
Fig. 1 is a schematic structural diagram of an offshore floating wind turbine system according to embodiment 1;
FIG. 2 is a schematic structural diagram of a tension leg moored offshore floating wind turbine foundation structure in the embodiment 1;
FIG. 3 is a schematic structural diagram of an offshore floating wind turbine system according to embodiment 2;
FIG. 4 is a schematic structural diagram of an offshore floating wind turbine foundation structure moored by tension legs in embodiment 2;
FIG. 5 is a schematic structural diagram of an offshore floating wind turbine system according to embodiment 3;
FIG. 6 is a schematic structural diagram of an embodiment 3 of a tension leg moored offshore floating wind turbine foundation structure;
FIG. 7 is a schematic structural diagram of an offshore floating wind turbine system according to embodiment 4;
FIG. 8 is a schematic structural diagram of an embodiment 4 of a tension leg moored offshore floating wind turbine infrastructure.
Detailed Description
The invention is further illustrated by the following examples:
example 1
The embodiment discloses a tension leg moored offshore floating wind turbine foundation structure as shown in fig. 1 and fig. 2, which comprises a floating body 3, a mooring system 4 and an anchoring system 5;
the floating body 3 comprises a cylindrical center upright post 6, an outer side upright post and 3 groups of buoys which are connected between the center upright post and the outer side upright post and are distributed in star symmetry, and the 3 groups of buoys are arranged around the center of the center upright post 6 in a central symmetry manner. Every float of group is two, is upper buoy 8 and lower floor's float bowl 9 respectively, and two-layer arrangement about two float bowls are, lower floor's float bowl 9 level is arranged, and the one end downward sloping of central pillar 6 is kept away from to upper buoy 8. The upper layer of buoys 8 and the lower layer of buoys 9 have a distance of more than 1 meter at one end close to the central upright post 6, and the distance between the upper layer of buoys 8 and the lower layer of buoys 9 at one end far away from the central upright post 6 is smaller. The inclination angle of the upper layer buoy 8 is made according to the requirements of manufacturing, installation and in-place working condition. A gap is formed between the upper layer of floating cylinder and the lower layer of floating cylinder at the position close to the central upright post for water flow to pass through, so that the horizontal load of the water flow acting on the floating cylinders is reduced.
The one end that the center pillar was kept away from to the flotation pontoon is connected on outside stand 7, outside stand 7 is the cylinder the same with the flotation pontoon profile, the flotation pontoon cross-section is square, and outside stand 7 is the square the same with the flotation pontoon cross-section. The flotation pontoon cross-section is the gradual change, the flotation pontoon is kept away from that 6 one side radial cross-section radiuses of center pillar are less, is close to that one side radial cross-section radius of center pillar is great to bear the great moment of flexure effect of center department. The structural form of the floating barrel is a ribbed plate shell form. The buoy is made of glass fiber reinforced material. The buoys arranged in the upper layer and the lower layer can increase the number of the buoys to provide more buoyancy, and can reduce the vertical projection area and reduce the wave load caused by the water quality point and the structure action.
The bottom end of the upright post 7 at the outer side of the floating body 3 is connected with an anchoring system 5 through a mooring system 4, namely, the floating body 3 is fixed on the seabed through the mooring system 4 and the anchoring system 5, and the mooring system 4 is always in a pulled state. In this embodiment, the mooring system 4 is a tension tendon, and the tension tendon is kept in a tensioned state in a life cycle and kept at a high level, so that overall instability caused by movement of the fan and the foundation is avoided. In this embodiment, each outer upright post 7 is connected with 2 tension tendons, each tension tendon is an anchor chain, and each tension tendon is perpendicular to the seabed. The anchoring system is a pile foundation.
The foundation structure of the offshore floating type wind turbine moored by the tension legs can provide larger buoyancy, the system is ensured to always keep positive buoyancy under various marine environmental conditions, and the mooring system is always in a pulled state, so that the foundation function of the offshore floating type wind turbine with the tension legs is realized.
The embodiment also discloses an offshore floating wind turbine system, which comprises the offshore floating wind turbine foundation structure moored by the tension legs, a tower 2 and a wind turbine 1, wherein the wind turbine 1 is installed at the upper end of the tower 2, and the lower end of the tower 2 is connected to the top of the central upright post 6 through a flange, as shown in fig. 1. Tension leg form floating fan adopts double-deck flotation pontoon form, when improving buoyancy, does not increase the wave load, and double-deck flotation pontoon provides great structural strength simultaneously, reduces node steel internal stress level and improves the structural safety nature.
The invention relates to an installation of an offshore floating type fan system, which comprises the following steps: and the integration of a floating body, a tower drum, a fan unit and blades is carried out at a wharf on the bank. And (4) pre-installing an anchoring system and a tensioning mooring system at a fan position. The installed taut mooring system may be temporarily placed on the sea floor or placed in tension in the water with a temporary buoy. The integrated floating fan system is transported to a fan position by a transportation auxiliary floating body or a barge for installation in place. After the floating wind turbine arrives at the aircraft site, the ballasting down draft is connected to the taut mooring system. After the connection is completed, the ballast water is discharged to float the floating body, and the mooring system is tensioned. And finishing the in-place installation of the floating body.
Example 2
The embodiment discloses a tension leg moored offshore floating wind turbine foundation structure as shown in fig. 3 and 4, which comprises a floating body 3, a mooring system 4 and an anchoring system 5;
the floating body 3 comprises a central upright post 6 and 4 groups of buoys which are connected to the side wall of the central upright post and are distributed in star symmetry. The 4 groups of buoys are arranged symmetrically around the center of the center column 6. Every group flotation pontoon is two, is upper strata flotation pontoon 8 and lower floor flotation pontoon 9 respectively, and two-layer arrangement about two flotation pontoons are, the one end that the center stand was kept away from to the flotation pontoon is connected on outside stand 7, the outside stand is the cylinder the same with the flotation pontoon profile, the flotation pontoon cross-section is square.
The structure form of the buoy is a ribbed plate shell form. The radial cross section of the buoy remains uniform. The lower layer of floating cylinders 9 are horizontally arranged, and one ends of the upper layer of floating cylinders 8, which are far away from the central upright post 6, are inclined downwards. The inclination angle is set according to the requirements of manufacturing, installation and in-place working conditions. The buoy is made of concrete. A gap is formed between the upper and lower layers of floating cylinders at a position close to the central upright post for water flow to pass through, so that the horizontal load of the water flow acting on the floating cylinders is reduced. The top of the central upright post is used for connecting an offshore floating type fan tower; the buoys arranged in the upper layer and the lower layer can increase the number of the buoys to provide more buoyancy, and can reduce the vertical projection area and reduce the wave load caused by the water quality point and the structure action. The bottom end of the upright post at the outer side of the floating body 3 is connected with an anchoring system 5 through a mooring system 4, namely, the floating body 3 is fixed on the seabed through the mooring system 4 and the anchoring system 5, and the mooring system is always in a tension state. The mooring system 4 is a tendon. The tension tendons are kept in a tension state in the life cycle, the tension force is kept at a high level, and integral instability caused by movement of the fan and the foundation is avoided. Each outer upright post 7 is connected with 2 tension tendons. The tension tendon is a steel pipe. The included angle between the tension tendon and the seabed is slightly less than 90 degrees. The anchoring system is a gravity based.
The foundation structure of the offshore floating type wind turbine moored by the tension legs can provide larger buoyancy, the system is ensured to keep positive buoyancy all the time under various marine environment conditions, and the mooring system is always in a pulled state, so that the foundation function of the floating type wind turbine with the tension legs is realized.
The embodiment also discloses an offshore floating wind turbine system, as shown in fig. 4, the offshore floating wind turbine system comprises the tension leg mooring offshore floating wind turbine foundation structure, a tower drum 2 and a wind turbine 1, wherein the wind turbine 1 is installed at the upper end of the tower drum, and the lower end of the tower drum is connected to the top of the central upright post through a flange. The floating fan in the form of the tension leg adopts the form of a double-layer buoy, so that the buoyancy is improved, the wave load is not increased, meanwhile, the double-layer buoy provides greater structural strength, the internal stress level of node steel is reduced, and the structural safety is improved.
The invention relates to the installation of an offshore floating type fan system: and (4) integrating a floating body, a tower drum, a fan unit and blades at a quayside wharf. And (4) pre-installing an anchoring system and a tensioning mooring system at a fan position. The installed taut mooring system may be temporarily placed on the sea floor or placed in tension in the water with a temporary buoy. The integrated floating type fan system is transported to a fan position by means of a transportation auxiliary floating body or a barge to be installed in place. After the floating wind turbine arrives at the aircraft site, the ballasting down draft is connected to the taut mooring system. After the connection is completed, the ballast water is discharged to float the floating body, and the mooring system is tensioned. And finishing the in-place installation of the floating body.
Example 3
The embodiment discloses a tension leg moored offshore floating wind turbine foundation structure as shown in fig. 5 and 6, which comprises a floating body 3, a mooring system 4 and an anchoring system 5;
the floating body 3 comprises a central upright post 6 and 3 groups of buoys which are connected to the side wall of the central upright post and are distributed in star symmetry. The 3 groups of buoys are arranged symmetrically around the center of the center column 6. Every group flotation pontoon is two, is upper strata flotation pontoon 8 and lower floor flotation pontoon 9 respectively, and two-layer arrangement about two flotation pontoons are, the one end that the center pillar was kept away from to the flotation pontoon is connected on outside stand 7, the outside stand is circular stand, the flotation pontoon cross-section is circular. The structure form of the buoy is a ribbed plate shell form. The radial cross-section of flotation pontoon changes gradually, the radial cross-section radius of flotation pontoon is less on one side of keeping away from central pillar, and is close to central pillar one side radial cross-section radius great to bear the great moment of flexure effect of center department. The lower layer of floating cylinders 9 are horizontally arranged, and one ends of the upper layer of floating cylinders 8 far away from the central upright post 6 are inclined downwards. The inclination angle is made according to the requirements of manufacturing, installation and in-place working condition. The buoy is made of concrete. A gap is formed between the upper layer of floating cylinder and the lower layer of floating cylinder at the position close to the central upright post for water flow to pass through, so that the horizontal load of the water flow acting on the floating cylinders is reduced. The top of the central upright post is used for connecting an offshore floating type fan tower; the upper and lower two-layer arrangement's flotation pontoon increases the flotation pontoon quantity on the one hand and can provide more buoyancy, and on the other hand can reduce vertical projection area, reduces the wave load that quality of water point and structure effect arouse.
The bottom end of the upright column at the outer side of the floating body 3 is connected with an anchoring system 5 through a mooring system 4, namely, the floating body 3 is fixed on the seabed through the mooring system 4 and the anchoring system 5, and the mooring system is always in a tension state. The mooring system 4 is a tendon. The tension tendon keeps a tension state in a life cycle, and keeps the tension at a higher level, so that the integral instability caused by the movement of the fan and the foundation is avoided. Each outer upright post 7 is connected with 3 tension tendons which are steel cables. The tendons are perpendicular to the sea bed. The anchoring system is a suction bucket foundation.
The foundation structure of the offshore floating type fan moored by the tension legs can provide larger buoyancy, the system is ensured to keep positive buoyancy all the time under various marine environment conditions, and the mooring system is always in a pulled state, so that the foundation function of the offshore floating type fan with the tension legs is realized.
The embodiment also discloses an offshore floating wind turbine system, as shown in fig. 5, the offshore floating wind turbine system comprises the tension leg mooring offshore floating wind turbine foundation structure, a tower drum 2 and a wind turbine 1, wherein the wind turbine 1 is installed at the upper end of the tower drum, and the lower end of the tower drum is connected to the top of the central upright post through a flange. The floating fan in the form of the tension leg adopts the form of a double-layer buoy, so that the buoyancy is improved, the wave load is not increased, meanwhile, the double-layer buoy provides greater structural strength, the internal stress level of node steel is reduced, and the structural safety is improved.
The invention relates to an installation of an offshore floating type fan system, which comprises the following steps: and the integration of a floating body, a tower drum, a fan unit and blades is carried out at a wharf on the bank. And (4) pre-installing an anchoring system and a tensioning mooring system at a fan position. The installed taut mooring system may be temporarily placed on the sea floor or placed in tension in the water with a temporary buoy. The integrated floating fan system is transported to a fan position by a transportation auxiliary floating body or a barge for installation in place. After the floating wind turbine arrives at the aircraft site, the ballasting down draft is connected to the taut mooring system. After the connection is completed, the ballast water is discharged to float the floating body, and the mooring system is tensioned. And finishing the in-place installation of the floating body.
Example 4
The embodiment discloses a tension leg moored offshore floating wind turbine foundation structure as shown in fig. 7 and 8, which comprises a floating body 3, a mooring system 4 and an anchoring system 5;
the floating body 3 comprises a central upright post 6 and 4 groups of floating bowls which are connected to the side wall of the central upright post and are distributed in star symmetry. The 4 groups of buoys are arranged symmetrically around the center of the center column 6. Every group flotation pontoon is two, is upper strata flotation pontoon 8 and lower floor flotation pontoon 9 respectively, and two-layer arrangement about two flotation pontoons are, the one end that the center pillar was kept away from to the flotation pontoon is connected on outside stand 7, the outside stand is circular stand, the flotation pontoon cross-section is circular. The structure form of the buoy is a ribbed plate shell form. The radial cross-section of the pontoon remains uniform. The lower-layer floating barrels 9 are horizontally arranged, and one ends, far away from the central upright post 6, of the upper-layer floating barrels 8 are inclined downwards. The inclination angle is made according to the requirements of manufacturing, installation and in-place working condition. The buoy is made of glass fiber reinforced material. A gap is formed between the upper layer of floating drum and the lower layer of floating drum at a position close to the central upright post for water flow to pass through, so that the horizontal load of the water flow acting on the floating drums is reduced; the top of the central upright post is used for connecting an offshore floating type fan tower; the upper and lower two-layer arrangement's flotation pontoon increases the flotation pontoon quantity on the one hand and can provide more buoyancy, and on the other hand can reduce vertical projection area, reduces the wave load that quality of water point and structure effect arouse.
The bottom end of the upright column at the outer side of the floating body 3 is connected with an anchoring system 5 through a mooring system 4, namely, the floating body 3 is fixed on the seabed through the mooring system 4 and the anchoring system 5, and the mooring system is always in a tension state. The mooring system 4 is a tendon. The tension tendon keeps a tension state in a life cycle, and keeps the tension at a higher level, so that the integral instability caused by the movement of the fan and the foundation is avoided. Each outer upright post 7 is connected with 2 tension tendons which are made of composite fiber materials and are perpendicular to the seabed. The anchoring system is a suction bucket foundation.
The tension leg moored offshore floating type wind turbine foundation structure can provide larger buoyancy, the system is ensured to always keep positive buoyancy under various marine environmental conditions, and the mooring system is always in a pulled state, so that the foundation function of the tension leg floating type wind turbine is realized.
The embodiment also discloses an offshore floating wind turbine system, as shown in fig. 7, the offshore floating wind turbine system comprises the offshore floating wind turbine foundation structure moored by the tension legs, a tower drum 2 and a wind turbine 1, wherein the wind turbine 1 is installed at the upper end of the tower drum, and the lower end of the tower drum is connected to the top of the central upright post through a flange. The floating fan in the form of the tension leg adopts the form of a double-layer buoy, so that the buoyancy is improved, the wave load is not increased, meanwhile, the double-layer buoy provides greater structural strength, the internal stress level of node steel is reduced, and the structural safety is improved.
The invention relates to an installation of an offshore floating type fan system, which comprises the following steps: and the integration of a floating body, a tower drum, a fan unit and blades is carried out at a wharf on the bank. And (4) carrying out the installation of an anchoring system and a tensioning mooring system in advance at the position of the fan. The installed taut mooring system may be temporarily placed on the sea floor or placed in tension in the water with a temporary buoy. The integrated floating type fan system is transported to a fan position by means of a transportation auxiliary floating body or a barge to be installed in place. After the floating wind turbine arrives at the aircraft site, the ballasting down draft is connected to the taut mooring system. After the connection is completed, the ballast water is discharged to float the floating body, and the mooring system is tensioned. And finishing the in-place installation of the floating body.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A tension leg moored offshore floating type wind turbine foundation structure is characterized by comprising a floating body (3), a mooring system (4) and an anchoring system (5);
the floating body (3) comprises a central upright post (6), a plurality of outer side upright posts and a plurality of groups of floating barrels which are connected between the central upright post and the outer side upright posts and are distributed in a star-shaped symmetrical manner, each group of floating barrels is two, the two floating barrels are arranged in an upper layer and a lower layer, one end of each floating barrel, which is far away from the central upright post, is connected to the outer side upright post (7), and a gap is formed between the upper layer floating barrel and the lower layer floating barrel at a position close to the central upright post;
the bottom end of the upright post at the outer side of the floating body (3) is connected with an anchoring system (5) through a mooring system (4), and the mooring system (4) is always in a tension state.
2. Tension leg moored offshore floating wind turbine infrastructure according to claim 1, characterized in that the buoy (3) comprises 3-8 groups of buoys.
3. The tension leg moored offshore floating wind turbine infrastructure of claim 1, wherein the buoy radial cross section is circular, square or polygonal.
4. Tension leg moored offshore floating wind turbine infrastructure according to claim 1, wherein said pontoon cross-section is uniform or gradually changing in axial direction, said pontoon being able to maintain a uniform cross-section or having a smaller radial cross-section radius on the side away from the central column and a larger radial cross-section radius on the side close to the central column.
5. Tension leg moored offshore floating wind turbine infrastructure according to claim 1, characterized in that the lower buoy (9) is arranged horizontally or inclined downwards and the upper buoy (8) is arranged horizontally or inclined upwards.
6. The tension leg moored offshore floating wind turbine infrastructure of claim 1, wherein the buoy material is steel, concrete or fiberglass reinforced material.
7. Tension leg moored offshore floating wind turbine infrastructure according to claim 1, characterized in that the mooring system (4) is a tension tendon.
8. The tension leg moored offshore floating wind turbine infrastructure of claim 7, wherein said tension tendons are steel pipes, anchor chains, steel cables, or composite fiber materials.
9. Tension leg moored offshore floating wind turbine infrastructure according to claim 7, characterized in that the tension tendons can be perpendicular to the sea bed or slightly inclined.
10. Offshore floating wind turbine system, comprising a tension leg moored offshore floating wind turbine infrastructure, a tower (2) and a wind turbine (1) according to any of claims 1-9, wherein the wind turbine (1) is mounted at the upper end of the tower (2), and the lower end of the tower (2) is connected to the top of a central upright (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210818241.1A CN115158549A (en) | 2022-07-13 | 2022-07-13 | Tension leg mooring offshore floating type fan foundation structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210818241.1A CN115158549A (en) | 2022-07-13 | 2022-07-13 | Tension leg mooring offshore floating type fan foundation structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115158549A true CN115158549A (en) | 2022-10-11 |
Family
ID=83492172
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210818241.1A Pending CN115158549A (en) | 2022-07-13 | 2022-07-13 | Tension leg mooring offshore floating type fan foundation structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115158549A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116002002A (en) * | 2023-02-02 | 2023-04-25 | 大连理工大学 | Tension leg type wind-wave energy complementary floating platform assembled with load shedding stability augmentation device |
| CN116001999A (en) * | 2022-12-12 | 2023-04-25 | 上海勘测设计研究院有限公司 | Marine floating platform device, construction method and working method |
-
2022
- 2022-07-13 CN CN202210818241.1A patent/CN115158549A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116001999A (en) * | 2022-12-12 | 2023-04-25 | 上海勘测设计研究院有限公司 | Marine floating platform device, construction method and working method |
| CN116001999B (en) * | 2022-12-12 | 2024-03-01 | 上海勘测设计研究院有限公司 | Marine floating platform device, construction method and working method |
| CN116002002A (en) * | 2023-02-02 | 2023-04-25 | 大连理工大学 | Tension leg type wind-wave energy complementary floating platform assembled with load shedding stability augmentation device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP2836708B1 (en) | Floating wind turbine platform and method of assembling | |
| US9394035B2 (en) | Floating wind turbine platform and method of assembling | |
| US10202170B2 (en) | Hull for a floating wind turbine platform | |
| EP2993270B1 (en) | Submersible structure for actively supporting towers of generators and sub-stations or similar elements, in maritime facilities | |
| CN211519801U (en) | Floating offshore wind power foundation structure with additional net cage | |
| CN111232140B (en) | Floating offshore wind power foundation structure with additional net cage | |
| CN114962165A (en) | Method of assembling a floating wind turbine platform | |
| CN115158549A (en) | Tension leg mooring offshore floating type fan foundation structure | |
| CN112523969B (en) | Truss inhaul cable type floating offshore wind turbine structure | |
| CN108248783B (en) | construction method of offshore wind power submersible floating foundation | |
| CN103255752B (en) | Support the buoyant support fixed platform of offshore wind turbine, marine works | |
| CN111734584B (en) | Floating type fan foundation and fan | |
| CN110671280A (en) | Floating type fan foundation | |
| CN217893155U (en) | Tension leg mooring offshore floating type fan foundation structure and offshore floating type fan system | |
| CN110356521B (en) | Floating drum flexible connection type semi-submersible floating fan structure | |
| CN111942533A (en) | Three-upright-column offshore wind power generation platform system | |
| CN113619742B (en) | Hybrid floating offshore wind turbine platform and design and construction method of composite material side column thereof | |
| CN114408110A (en) | Strong wind resistant fully-submersible wind power platform | |
| CN213139091U (en) | Annular floating wind power platform | |
| KR20140128958A (en) | Floating precast-concrete structure for supporting a wind turbine | |
| CN217870596U (en) | Tensioning type fan foundation anchored on foundation seabed | |
| CN214092145U (en) | Truss inhaul cable type floating offshore wind turbine structure | |
| CN212716998U (en) | Automatic cross basic of driftage floats formula offshore wind power generation device | |
| CN212508652U (en) | Floating type foundation of offshore wind turbine generator set with grid type structure | |
| CN212294724U (en) | Equipment for prefabricating offshore wind power barrel type foundation at wharf front edge |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |